A Googol is already bigger than the number of elementary particles in the known Universe, but then there is the Googolplex. It is 1 followed by Googol zeros. I can't even write down the number, because there is not enough matter in the universe to form all the zeros:

10,000,000,000,000,000,000,000,000,000,000,000,000, ... (Googol number of Zeros)

And there are even larger numbers that need to use "Power Towers" to write them down.

For example, a Googolplex can be written as this power tower:
That is ten to the power of (10 to the power of 100),

But imagine an even bigger number like (which is a Googolplexian).

And we can easily create much larger numbers than those!

Finite

All of these numbers are "finite", we could eventually "get there".

But none of these numbers are even close to infinity. Because they are finite, and infinity is ... notfinite!

Using Infinity

We can sometimes use infinity like it is a number, but infinity does not behave like a real number.

To help you understand, think "endless" whenever you see the infinity symbol "∞":

For example: ∞ + 1 = ∞

Which says that infinity plus one is still equal to infinity.

When something is already endless, we can add 1 and it is still endless.